Automobile oil pump control device

Abstract

The utility model discloses an automobile oil pump control device, which can accurately monitor and control the running state of a motor by sampling the current of the motor in real time, detecting the three-phase counter electromotive force and monitoring the working temperature, and is beneficial to reducing the energy consumption and improving the working efficiency of a gear pump by accurately controlling the motor. The inverter adjusts the voltage and frequency of the motor according to instructions of the master control module, optimizes the operation efficiency and reduces unnecessary energy consumption, the temperature detection circuit avoids overheating of the motor, prolongs the service life, triggers a protection mechanism in case of abnormity and improves the reliability and safety of the system, the current sampling circuit monitors current in real time, and once abnormity such as overload or short circuit is found, the system is safe and reliable. The main control module immediately takes measures to protect the motor, the main control module comprehensively monitors the state of the motor and provides fault alarm and positioning information, rapid maintenance is facilitated, and on the whole, the response speed, stability and energy efficiency of the suspension system are improved through the scheme.

Description

Technical Field

[0001] This utility model relates to the field of automotive control technology, and in particular to an automotive oil pump control device. Background Technology

[0002] In the development of the automotive industry, improving the performance of the fuel supply system has always been an important direction for technological innovation. As the core component of the fuel supply system, the optimization of the control method of the automotive fuel pump is crucial for improving fuel efficiency, reducing emissions, and enhancing the overall performance of the vehicle. Early automotive fuel pump control mostly adopted mechanical or simple electronic control methods, which had obvious shortcomings in terms of control accuracy, response speed, and intelligence. With the continuous advancement of automotive electronics technology, people have begun to explore more advanced electronic control methods to achieve precise control and intelligent management of the fuel pump.

[0003] However, existing automotive fuel pump electronic control technology still faces challenges in some aspects. On the one hand, the stability and accuracy of control signals need to be improved. Due to the characteristics of electronic components and the influence of environmental factors, control signals may fluctuate and have errors during transmission and processing, thus affecting the precise control of the fuel pump. On the other hand, fuel pump operating status monitoring and fault diagnosis technology also urgently need improvement. Traditional monitoring methods often rely on manual inspection and simple sensor signals, which cannot reflect the operating status and potential faults of the fuel pump in real time and accurately. This may result in the fuel pump not being repaired in time when a fault occurs, thereby affecting the normal operation and safety of the vehicle. Utility Model Content

[0004] In view of this, the present invention proposes an automotive oil pump control device, which can solve the obvious defects of the prior art, such as low control accuracy and inability to accurately reflect the working status and potential faults of the oil pump in real time.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An automotive oil pump control device includes:

[0007] The power supply module is used to provide operating voltage for the communication module, main control module, three-phase drive module and sampling module;

[0008] The communication module is used to communicate with the host computer.

[0009] The main control module is used to output PWM drive signals;

[0010] The three-phase drive module is used to control the NMOS transistor to turn on and off according to the PWM drive signal, thereby controlling the turn-on and turn-off of the automotive oil pump.

[0011] The sampling module is used to acquire differential current signals and temperature data from the three-phase drive module.

[0012] As a further optional solution for the automotive oil pump control device, the sampling module includes a signal sampling circuit and a MOS temperature detection circuit. The signal sampling circuit uses differential signal routing to collect the differential current signal of the three-phase drive module, and the MOS temperature detection circuit is used to collect the temperature data of the three-phase drive module.

[0013] As a further optional embodiment of the automotive oil pump control device, the signal sampling circuit includes:

[0014] An amplifier is used to amplify the sampled current signal;

[0015] A current source is used to provide the current to be sampled;

[0016] Resistive elements are used to convert current into voltage signals and to adjust the gain of an amplifier;

[0017] Capacitors are used for filtering;

[0018] Inductors are used to suppress electromagnetic interference.

[0019] As a further optional embodiment of the automotive oil pump control device, the MOS temperature detection circuit includes:

[0020] NTC thermistors are used to detect temperature and convert temperature changes into changes in resistance.

[0021] A voltage divider element is used to convert changes in the resistance of a thermistor into changes in a voltage signal.

[0022] MOS temperature sensing element is used to detect temperature data of the three-phase drive module;

[0023] Filtering components are used to filter out noise and interference in circuits.

[0024] As a further optional solution for the automotive oil pump control device, the three-phase drive module uses six NMOS transistors, which are respectively connected to the three-phase windings of the three-phase motor. By controlling the conduction and cutoff of the NMOS transistors, the drive control of the three-phase motor is realized.

[0025] As a further optional solution for the automotive oil pump control device, the main control module includes an FU6866Q chip and its peripheral circuitry.

[0026] As a further optional feature of the automotive oil pump control device, the communication module includes a SI T1051QT chip and its peripheral circuitry.

[0027] The beneficial effects of this utility model are as follows: The power supply module provides a stable operating voltage for the entire control device, ensuring the normal operation of the communication module, main control module, three-phase drive module, and sampling module, thus improving the stability and reliability of the device. The communication module enables effective communication with the host computer, allowing operators to remotely monitor and control the working status of the automotive oil pump, improving the convenience and flexibility of operation. The main control module outputs a precise PWM drive signal. By adjusting the duty cycle of the PWM signal, the on and off times of the NMOS transistor can be precisely controlled, thereby achieving precise regulation of the speed and flow of the automotive oil pump, improving the working efficiency and control accuracy of the oil pump. The three-phase drive module efficiently controls the on and off times of the NMOS transistor according to the PWM drive signal, thus stably and reliably controlling the on and off times of the automotive oil pump. This control method reduces the starting impact and operating noise of the oil pump, extending its service life. The sampling module can collect the differential current signal and temperature data of the three-phase drive module in real time. This information is used for safety functions such as fault warning and overload protection, improving the real-time performance and accuracy of reflecting the working status and potential faults of the oil pump. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the composition of an automotive oil pump control device according to the present invention;

[0030] Figure 2 This is a circuit diagram of the power supply module in this utility model;

[0031] Figure 3 This is a circuit diagram of the communication module in this utility model;

[0032] Figure 4 This is a circuit diagram of the main control module in this utility model;

[0033] Figure 5 This is a circuit diagram of the three-phase drive module in this utility model;

[0034] Figure 6 This is a circuit diagram of the signal sampling circuit in this utility model;

[0035] Figure 7 This is a circuit diagram of the MOS temperature detection circuit in this utility model. Detailed Implementation

[0036] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] refer to Figures 1 to 7 An automotive oil pump control device, comprising:

[0038] The power supply module is used to provide operating voltage for the communication module, main control module, three-phase drive module and sampling module;

[0039] The communication module is used to communicate with the host computer.

[0040] The main control module is used to output PWM drive signals;

[0041] The three-phase drive module is used to control the NMOS transistor to turn on and off according to the PWM drive signal, thereby controlling the turn-on and turn-off of the automotive oil pump.

[0042] The sampling module is used to acquire differential current signals and temperature data from the three-phase drive module.

[0043] In this embodiment, the power supply module provides a stable operating voltage for the entire control device, ensuring the normal operation of the communication module, main control module, three-phase drive module, and sampling module, thus improving the stability and reliability of the device. The communication module enables effective communication with the host computer, allowing operators to remotely monitor and control the working status of the automotive oil pump, improving the convenience and flexibility of operation. The main control module outputs a precise PWM drive signal. By adjusting the duty cycle of the PWM signal, the on and off times of the NMOS transistor can be precisely controlled, thereby achieving precise adjustment of the speed and flow of the automotive oil pump, improving the working efficiency and control accuracy of the oil pump. The three-phase drive module efficiently controls the on and off of the NMOS transistor according to the PWM drive signal, thereby stably and reliably controlling the on and off of the automotive oil pump. This control method reduces the starting shock and operating noise of the oil pump, extending its service life. The sampling module can collect the differential current signal and temperature data of the three-phase drive module in real time. This information is used for safety functions such as fault warning and overload protection, improving the real-time performance and accuracy of reflecting the working status and potential faults of the oil pump.

[0044] Preferably, the sampling module includes a signal sampling circuit and a MOS temperature detection circuit. The signal sampling circuit uses differential signal traces to acquire the differential current signal of the three-phase drive module, and the MOS temperature detection circuit is used to acquire the temperature data of the three-phase drive module.

[0045] In this embodiment, the signal sampling circuit uses differential signal traces, a design that effectively resists electromagnetic interference (EMG). I) This reduces common-mode noise and improves the stability and accuracy of signal transmission. Differential signal traces, by comparing two complementary signals, can more accurately capture current changes, thus achieving high-precision acquisition of the differential current signal from the three-phase drive module. High-precision current sampling helps monitor the real-time operating status of the automotive oil pump, promptly detect current anomalies, and prevent overload or short-circuit faults. The MOS temperature detection circuit can acquire temperature data from the three-phase drive module in real time, which is crucial for ensuring that the NMOS transistors operate within a safe temperature range. Through temperature monitoring, the device can promptly detect and respond to overheating, taking appropriate protective measures, such as reducing the oil pump speed or temporarily shutting down the oil pump, to prevent component damage or performance degradation caused by high temperatures. Temperature data acquisition also helps optimize the oil pump's operating strategy, such as automatically adjusting the operating mode to reduce temperature in high-temperature environments and extending component lifespan. The data collected by the sampling module can serve as an important basis for fault diagnosis. When a fault occurs in the device, analyzing current and temperature data can quickly locate the problem, improving maintenance efficiency. Simultaneously, this data can also be used for preventative maintenance, predicting potential faults by analyzing historical data and taking preventative measures to avoid their occurrence.

[0046] Preferably, the signal sampling circuit includes:

[0047] An amplifier is used to amplify the sampled current signal;

[0048] A current source is used to provide the current to be sampled;

[0049] Resistive elements are used to convert current into voltage signals and to adjust the gain of an amplifier;

[0050] Capacitors are used for filtering;

[0051] Inductors are used to suppress electromagnetic interference.

[0052] In this embodiment, the amplifier amplifies the sampled weak current signal so that subsequent circuits can accurately process and identify it. This is crucial for improving the sensitivity and accuracy of the device. The amplifier's gain can be adjusted using resistors to accommodate different current signal intensities, ensuring that the signal is not distorted during amplification. The current source provides the current to be sampled, which is the foundation of the signal sampling circuit. By precisely controlling the output of the current source, the representativeness of the sampled current signal can be ensured. The resistor converts the current into a voltage signal, which is a key step in current sampling. The resistance value determines the current-to-voltage conversion ratio and also affects the amplifier's gain. Capacitors act as filters in circuits, removing high-frequency noise and interference from current signals and improving signal purity and stability. Inductors suppress electromagnetic interference (EMI), protecting circuits from external electromagnetic fields, which is crucial for improving signal anti-interference capabilities and system stability. Precise signal sampling and processing provide strong support for fault diagnosis. By analyzing sampled current and voltage signals, fault points can be located more quickly, improving maintenance efficiency. Furthermore, the design of signal sampling circuits also considers ease of maintenance, such as adjusting the resistance value of resistors to change the amplifier gain to adapt to different operating conditions.

[0053] It should be noted that the resistive components include resistor R26 and resistor R27. Resistor R26 serves as a shunt resistor, connected in series with the current source to convert the current into a voltage signal. Resistor R27 serves as a feedback resistor, connected to the amplifier to adjust the amplifier's gain.

[0054] Preferably, the MOS temperature detection circuit includes:

[0055] NTC thermistors are used to detect temperature and convert temperature changes into changes in resistance.

[0056] A voltage divider element is used to convert changes in the resistance of a thermistor into changes in a voltage signal.

[0057] MOS temperature sensing element is used to detect temperature data of the three-phase drive module;

[0058] Filtering components are used to filter out noise and interference in circuits.

[0059] In this embodiment, the NTC thermistor has high sensitivity and high accuracy, and can accurately convert temperature changes into resistance changes. This conversion relationship enables the circuit to accurately sense the temperature changes of the three-phase drive module. The NTC thermistor has a fast response speed, making it suitable for applications requiring rapid temperature detection. In the three-phase drive module, rapid temperature detection helps to promptly detect and handle overheating problems, preventing malfunctions. The NTC thermistor has good stability and can maintain stable performance under different environmental conditions, enabling the circuit to accurately detect temperature data under various operating conditions. The MOS temperature sensing element can directly detect the temperature data of the three-phase drive module without the need for additional sensors or conversion circuits, which reduces the complexity and cost of the system. The filtering element can filter out noise and interference in the circuit, improving the accuracy and reliability of temperature data. In the three-phase drive module, the filtering element helps to prevent false alarms and malfunctions caused by noise and interference.

[0060] It should be noted that the voltage divider components include resistor R60, which is connected in series with the NTC thermistor to form a voltage divider circuit, and the filter components include capacitor C42.

[0061] Preferably, the three-phase drive module uses six NMOS transistors, which are respectively connected to the three-phase windings of the three-phase motor. By controlling the conduction and cutoff of the NMOS transistors, the drive control of the three-phase motor is realized.

[0062] In this embodiment, six NMOS transistors are connected to the three-phase windings of a three-phase motor, enabling independent control of each winding. This control method allows the system to precisely regulate the current and voltage of each phase as needed, thereby improving the motor's operating efficiency and performance. Independent control of each winding helps achieve smooth torque output and reduces motor vibration and noise. As switching elements, NMOS transistors have low on-resistance and switching losses. By precisely controlling the on and off times of the NMOS transistors, power consumption can be minimized, improving the device's energy efficiency. Precise control of the current and voltage of each winding helps optimize motor performance, such as improving efficiency, reducing temperature rise, and extending service life. By monitoring the operating status of each NMOS transistor, the device can promptly detect and isolate faulty components, preventing fault propagation and impacting the normal operation of the entire system. Precise control of the current in each winding contributes to more effective thermal management. By adjusting the current distribution, the heat generated by each winding can be balanced, reducing the overall motor temperature and improving the device's reliability and stability.

[0063] Preferably, the main control module includes an FU6866Q chip and its peripheral circuitry.

[0064] Preferably, the communication module includes a SIT1051QT chip and its peripheral circuitry.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A car oil pump control device, characterized in that, include: The power supply module is used to provide operating voltage for the communication module, main control module, three-phase drive module and sampling module; The communication module is used to communicate with the host computer. The main control module is used to output PWM drive signals; The three-phase drive module is used to control the NMOS transistor to turn on and off according to the PWM drive signal, thereby controlling the turn-on and turn-off of the automotive oil pump. The sampling module is used to acquire differential current signals and temperature data from the three-phase drive module.

2. The automotive oil pump control device according to claim 1, characterized in that, The sampling module includes a signal sampling circuit and a MOS temperature detection circuit. The signal sampling circuit uses differential signal traces to collect the differential current signal of the three-phase drive module, and the MOS temperature detection circuit is used to collect the temperature data of the three-phase drive module.

3. The automotive oil pump control device according to claim 2, characterized in that, The signal sampling circuit includes: An amplifier is used to amplify the sampled current signal; A current source is used to provide the current to be sampled; Resistive elements are used to convert current into voltage signals and to adjust the gain of an amplifier; Capacitors are used for filtering. Inductors are used to suppress electromagnetic interference.

4. The automotive oil pump control device according to claim 3, characterized in that, The MOS temperature detection circuit includes: NTC thermistors are used to detect temperature and convert temperature changes into changes in resistance. A voltage divider element is used to convert changes in the resistance of a thermistor into changes in a voltage signal. MOS temperature sensing element is used to detect temperature data of the three-phase drive module; Filtering components are used to filter out noise and interference in circuits.

5. The automotive oil pump control device according to claim 4, characterized in that, The three-phase drive module uses six NMOS transistors, which are respectively connected to the three-phase windings of the three-phase motor. By controlling the conduction and cutoff of the NMOS transistors, the drive control of the three-phase motor is realized.

6. The automotive oil pump control device according to claim 5, characterized in that, The main control module includes the FU6866Q chip and its peripheral circuits.

7. The automotive oil pump control device according to claim 6, characterized in that, The communication module includes the SIT1051QT chip and its peripheral circuitry.

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